Its name says it all. This is the weapon to own when fighting up close and personal is your specialty. There are not many M4 variants that boast this many features: all metal body, metal barrel, 7mm gear box, Armalite Logo, upgraded receiver pins, advanced hop-up system and steel gears are all part of the package. Also standard are its vertical forgrip, flat-rail top receiver, and shorter CQB barrel. Match that to a muzzle velocity of 325fps and a 300rd mag, and you have a one of the most feared beasts on the planet. Not to mention the crane stock, which will accept a, mind blowing, 3800mah battery. The upgrade potential begs to be unleashed - easily achieving over 400fps!!! If you thought that wolverines were fierce, you obviously haven't met the CQB.